US7327218B2 - Electronic identification system with forward error correction system - Google Patents
Electronic identification system with forward error correction system Download PDFInfo
- Publication number
- US7327218B2 US7327218B2 US11/166,439 US16643905A US7327218B2 US 7327218 B2 US7327218 B2 US 7327218B2 US 16643905 A US16643905 A US 16643905A US 7327218 B2 US7327218 B2 US 7327218B2
- Authority
- US
- United States
- Prior art keywords
- forward error
- data
- data message
- characters
- transponder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related, expires
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Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/10009—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
- G06K7/10019—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves resolving collision on the communication channels between simultaneously or concurrently interrogated record carriers.
- G06K7/10029—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves resolving collision on the communication channels between simultaneously or concurrently interrogated record carriers. the collision being resolved in the time domain, e.g. using binary tree search or RFID responses allocated to a random time slot
- G06K7/10039—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves resolving collision on the communication channels between simultaneously or concurrently interrogated record carriers. the collision being resolved in the time domain, e.g. using binary tree search or RFID responses allocated to a random time slot interrogator driven, i.e. synchronous
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/0008—General problems related to the reading of electronic memory record carriers, independent of its reading method, e.g. power transfer
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Vision & Pattern Recognition (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Theoretical Computer Science (AREA)
- Toxicology (AREA)
- Artificial Intelligence (AREA)
- General Health & Medical Sciences (AREA)
- Computer Networks & Wireless Communication (AREA)
- Electromagnetism (AREA)
- Detection And Prevention Of Errors In Transmission (AREA)
- Error Detection And Correction (AREA)
- Radar Systems Or Details Thereof (AREA)
- Detection And Correction Of Errors (AREA)
- Disintegrating Or Milling (AREA)
- Eye Examination Apparatus (AREA)
- Cash Registers Or Receiving Machines (AREA)
Abstract
Description
- an interrogator for transmitting a radio frequency (RF) interrogation signal;
- a plurality of radio frequency transponders;
- each transponder being operative in response to the interrogation signal to respond with a forward error correctable data message including base data encoded as symbol characters in accordance with a forward error correcting code and check characters on the base data as defined in the forward error correcting code, for facilitating reconstruction of the base data in the event of corruption of the forward error correctable data message during transmission; and
- the interrogator including
- receiver means for receiving the forward error correctable data message; and
- data processor means programmed to utilize data relating to the forward error correcting code, the symbol characters and the check characters in the received forward error correctable data message, to reconstruct the base data in the event of corruption of the received forward error correctable data message.
- an interrogator for transmitting a first radio frequency (RF) interrogation signal;
- a plurality of radio frequency transponders;
- each transponder being operative in response to the interrogation signal to respond with a forward error correctable data message including: base data in the form of identification code data unique to the transponder encoded as a first set of symbol characters in accordance with a first forward error correcting code, a first set of check characters on the identification code data as defined in the first forward error correcting code, other base data encoded as a second set of symbol characters in accordance with a second forward error correcting code and a second set of check characters on the other base data as defined in the second forward error correcting code, for facilitating reconstruction of the identification code data and other base data in the event of corruption of the forward error correctable data message during transmission; and
- the interrogator including
- receiver means for receiving the forward error correctable data messages; and
- data processor means programmed to utilize data relating to the first forward error correcting code, the first set of symbol characters and the first set of check characters in the received forward error correctable data message; and further programmed to utilize data relating to the second forward error correcting code, the second set of symbol characters and the second set of check characters in the received forward error correctable data message, to reconstruct the identity code data and the other base data respectively, in the event of corruption of the received forward error correctable data message.
- control means; and
- a data memory arrangement into which is programmable data associated with the transponder;
- the control means being operative in response to an interrogation signal to utilize the data associated with the transponder to cause the transponder to respond with a forward error correctable data message including base data relating to the transponder encoded as symbol characters in accordance with a forward error correcting code; and check characters on the base data as defined in the forward error correcting code, for facilitating reconstruction of the base data in the event of corruption of the forward error correctable data message during transmission.
- causing an interrogation signal to be transmitted by the interrogator;
- causing the transponder to respond to the interrogation signal with a forward error correctable data message including base data encoded as symbol characters in accordance with a forward error correcting code and check characters on the base data as defined in the forward error correcting code, for facilitating reconstruction of the base data in the event of corruption of the forward error correctable message during transmission;
- receiving the forward error correctable data message; and
- causing an error correction means to utilize data relating to the forward error correcting code, the symbol characters and the check characters in the received forward error correctable data message, in order to reconstruct the base data in the event of corruption of the received forward error correctable data message.
- causing a first interrogation signal to be transmitted by the interrogator; and
- causing the transponder to respond to the interrogation signal with a forward error correctable data message including: base data in the form of identification code data unique to the transponder encoded as a first set of symbol characters in accordance with a first forward error correcting code, a first set of check characters on the identification code data as defined in the first forward error correcting code, other base data encoded as a second set of symbol characters in accordance with a second forward error correcting code and a second set of check characters on the other base data as defined in the second forward error correcting code;
- receiving the forward error correctable data message; and
- causing an error correction means to utilize data relating to the first forward error correcting code,
- the first set of symbol characters and the first set of check characters in the received forward error correctable data message; and further to utilize data relating to the second forward error correcting code, the second set of symbol characters and the second set of check characters in the received forward error correctable data message, in order to reconstruct the identity code data and the other base data respectively, in the event of corruption of the received forward error correctable data message.
(n−k)−2b=z
where z is a measure of the inefficiency of the block code. For Reed-Solomon codes, z=0, so that Reed-Solomon Codes are highly efficient for correction of corrupted symbols. Two check characters can be used to correct any corrupted symbol character in the block at an unknown position within that block. One check character in effect localizes the erroneous symbol character and one check character is used to correct its magnitude or its value. In addition, when the position of a corrupted symbol character is known, it may be treated as an “erasure,” requiring only a single check character to correct the value. The maximum number of correctable erasures, v and correctable errors, t that a Reed-Solomon Code GF(2q) with k check characters per block of length n=(2q−1) can correct is given by:
2t+v≦k
2t≦(k−p)
Claims (7)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/166,439 US7327218B2 (en) | 1998-01-19 | 2005-06-24 | Electronic identification system with forward error correction system |
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ZA98/0410 | 1998-01-19 | ||
ZA98410 | 1998-01-19 | ||
US09/234,149 US6686829B1 (en) | 1998-01-19 | 1999-01-19 | Electronic identification system with forward error correction system |
US10/695,967 US6958678B2 (en) | 1998-01-19 | 2003-10-29 | Electronic identification system with forward error correction system |
US11/166,439 US7327218B2 (en) | 1998-01-19 | 2005-06-24 | Electronic identification system with forward error correction system |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/695,967 Continuation US6958678B2 (en) | 1998-01-19 | 2003-10-29 | Electronic identification system with forward error correction system |
Publications (2)
Publication Number | Publication Date |
---|---|
US20050237155A1 US20050237155A1 (en) | 2005-10-27 |
US7327218B2 true US7327218B2 (en) | 2008-02-05 |
Family
ID=25586822
Family Applications (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/234,149 Expired - Lifetime US6686829B1 (en) | 1998-01-19 | 1999-01-19 | Electronic identification system with forward error correction system |
US10/695,967 Expired - Lifetime US6958678B2 (en) | 1998-01-19 | 2003-10-29 | Electronic identification system with forward error correction system |
US11/166,439 Expired - Fee Related US7327218B2 (en) | 1998-01-19 | 2005-06-24 | Electronic identification system with forward error correction system |
Family Applications Before (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/234,149 Expired - Lifetime US6686829B1 (en) | 1998-01-19 | 1999-01-19 | Electronic identification system with forward error correction system |
US10/695,967 Expired - Lifetime US6958678B2 (en) | 1998-01-19 | 2003-10-29 | Electronic identification system with forward error correction system |
Country Status (5)
Country | Link |
---|---|
US (3) | US6686829B1 (en) |
EP (1) | EP0935211B8 (en) |
JP (1) | JPH11326507A (en) |
AT (1) | ATE298440T1 (en) |
DE (1) | DE69925875T2 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20060236203A1 (en) * | 2005-03-24 | 2006-10-19 | Diorio Christopher J | Error recovery in RFID reader systems |
US20070290803A1 (en) * | 2006-06-09 | 2007-12-20 | Arun Ayyagari | Data synchronization and integrity for intermittently connected sensors |
US20080100433A1 (en) * | 2006-10-27 | 2008-05-01 | Markus Desch | Method and Write/Read Station and Transponder of an RFID System for Data Transmission |
US20080165003A1 (en) * | 2007-01-04 | 2008-07-10 | Lockheed Martin Corporation | Rfid protocol for improved tag-reader communications integrity |
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US6763996B2 (en) * | 2001-09-18 | 2004-07-20 | Motorola, Inc. | Method of communication in a radio frequency identification system |
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AU2003219451A1 (en) | 2002-05-15 | 2003-12-02 | Koninklijke Philips Electronics N.V. | Transmission error resistant reader station |
US7830781B2 (en) * | 2002-08-13 | 2010-11-09 | Rockwell Collins, Inc. | Waveform for virtually simultaneous transmission and multiple receptions system and method |
JP3815562B2 (en) * | 2002-11-28 | 2006-08-30 | インターナショナル・ビジネス・マシーンズ・コーポレーション | Data processing method, communication system using the same, data transmission device, data reception device, and program |
US7764178B2 (en) * | 2003-03-03 | 2010-07-27 | Veroscan, Inc. | Interrogator and interrogation system employing the same |
US8174366B2 (en) * | 2003-03-03 | 2012-05-08 | Veroscan, Inc. | Interrogator and interrogation system employing the same |
US7019650B2 (en) * | 2003-03-03 | 2006-03-28 | Caducys, L.L.C. | Interrogator and interrogation system employing the same |
US7541933B2 (en) * | 2003-03-03 | 2009-06-02 | Veroscan, Inc. | Interrogator and interrogation system employing the same |
US8063760B2 (en) * | 2003-03-03 | 2011-11-22 | Veroscan, Inc. | Interrogator and interrogation system employing the same |
US7893840B2 (en) * | 2003-03-03 | 2011-02-22 | Veroscan, Inc. | Interrogator and interrogation system employing the same |
US7671744B2 (en) * | 2003-03-03 | 2010-03-02 | Veroscan, Inc. | Interrogator and interrogation system employing the same |
US8948279B2 (en) * | 2004-03-03 | 2015-02-03 | Veroscan, Inc. | Interrogator and interrogation system employing the same |
US8542717B2 (en) | 2003-03-03 | 2013-09-24 | Veroscan, Inc. | Interrogator and interrogation system employing the same |
US7178719B2 (en) * | 2003-04-07 | 2007-02-20 | Silverbrook Research Pty Ltd | Facilitating user interaction |
EP1646155B1 (en) * | 2003-08-11 | 2010-03-03 | Sony Corporation | Radio communication system and radio communication device |
JP3891156B2 (en) * | 2003-08-22 | 2007-03-14 | ソニー株式会社 | Electronic device and communication control method |
US7880589B2 (en) * | 2004-02-06 | 2011-02-01 | Battelle Memorial Institute | Communications device identification methods, communications methods, wireless communications readers, wireless communications systems, and articles of manufacture |
DE102004013837B4 (en) | 2004-03-16 | 2009-03-19 | Atmel Germany Gmbh | Method for wireless data transmission |
DE102004013156B4 (en) | 2004-03-17 | 2009-07-23 | Atmel Germany Gmbh | Method for data transmission in RFID or remote sensor systems |
US7841120B2 (en) | 2004-03-22 | 2010-11-30 | Wilcox Industries Corp. | Hand grip apparatus for firearm |
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US20060017545A1 (en) * | 2004-03-26 | 2006-01-26 | Volpi John P | Radio frequency identification interrogation systems and methods of operating the same |
US9296214B2 (en) | 2004-07-02 | 2016-03-29 | Zih Corp. | Thermal print head usage monitor and method for using the monitor |
US7501948B2 (en) * | 2004-09-29 | 2009-03-10 | Lone Star Ip Holdings, Lp | Interrogation system employing prior knowledge about an object to discern an identity thereof |
US7970947B1 (en) | 2005-03-10 | 2011-06-28 | Rockwell Collins, Inc. | Tactical targeting network technology small form factor user system |
US7714698B2 (en) * | 2005-08-08 | 2010-05-11 | Sandlinks Systems Ltd. | RFID-UWB system connected to WLAN infrastructure |
US20070035383A1 (en) * | 2005-08-09 | 2007-02-15 | Roemerman Steven D | Radio frequency identification interrogation systems and methods of operating the same |
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US8638194B2 (en) * | 2008-07-25 | 2014-01-28 | Axcess International, Inc. | Multiple radio frequency identification (RFID) tag wireless wide area network (WWAN) protocol |
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- 1999-01-19 AT AT99300337T patent/ATE298440T1/en not_active IP Right Cessation
- 1999-01-19 DE DE69925875T patent/DE69925875T2/en not_active Expired - Lifetime
- 1999-01-19 EP EP99300337A patent/EP0935211B8/en not_active Expired - Lifetime
- 1999-01-19 JP JP11010735A patent/JPH11326507A/en active Pending
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- 2005-06-24 US US11/166,439 patent/US7327218B2/en not_active Expired - Fee Related
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20060236203A1 (en) * | 2005-03-24 | 2006-10-19 | Diorio Christopher J | Error recovery in RFID reader systems |
US7405660B2 (en) * | 2005-03-24 | 2008-07-29 | Impinj, Inc. | Error recovery in RFID reader systems |
US20070290803A1 (en) * | 2006-06-09 | 2007-12-20 | Arun Ayyagari | Data synchronization and integrity for intermittently connected sensors |
US8723645B2 (en) * | 2006-06-09 | 2014-05-13 | The Boeing Company | Data synchronization and integrity for intermittently connected sensors |
US20080100433A1 (en) * | 2006-10-27 | 2008-05-01 | Markus Desch | Method and Write/Read Station and Transponder of an RFID System for Data Transmission |
US20080165003A1 (en) * | 2007-01-04 | 2008-07-10 | Lockheed Martin Corporation | Rfid protocol for improved tag-reader communications integrity |
US8120463B2 (en) * | 2007-01-04 | 2012-02-21 | Lockheed Martin Corporation | RFID protocol for improved tag-reader communications integrity |
Also Published As
Publication number | Publication date |
---|---|
US20050237155A1 (en) | 2005-10-27 |
EP0935211A2 (en) | 1999-08-11 |
DE69925875T2 (en) | 2006-05-04 |
US6686829B1 (en) | 2004-02-03 |
ATE298440T1 (en) | 2005-07-15 |
US6958678B2 (en) | 2005-10-25 |
EP0935211B8 (en) | 2005-09-07 |
JPH11326507A (en) | 1999-11-26 |
DE69925875D1 (en) | 2005-07-28 |
EP0935211B1 (en) | 2005-06-22 |
US20040090310A1 (en) | 2004-05-13 |
EP0935211A3 (en) | 2002-07-03 |
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